23cd34423b173c7ec0aa25f8f2729d3e621d1cb0b7cb2810c2eb850e8a35225b

General

Target

Cancellation_Letter_1482876532-02242021.xls
Size

144KB
MD5

16f442522a4ffe6a4759023fcd5478e0
SHA1

fd2c36091fd8428d9f3c73e5e51756c8959487c8
SHA256

23cd34423b173c7ec0aa25f8f2729d3e621d1cb0b7cb2810c2eb850e8a35225b
SHA512

ef934f47d8bb368c2628e85fa5c2edb1ca5a5b856b5385663cdf367b2d05b41c0d2b21df9660ed8f8398dcd9d1e673665db5dc37bdece77aecd6723fd3038bbc

Score

10^/10

Malware Config

Extracted

Language

xlm4.0

Source

URLs

xlm40.dropper

http://slmtv.com/tfbgl/44251784720833300000.dat

xlm40.dropper

http://dicomm-001-site35.ctempurl.com/pmslsda/44251784720833300000.dat

xlm40.dropper

http://konyahaberler.xyz/hxjxxwav/44251784720833300000.dat

xlm40.dropper

http://pandsquinny.com/nlbzyhfs/44251784720833300000.dat

xlm40.dropper

http://www.kunjincompany.com/anesrq/44251784720833300000.dat

Signatures

Process spawned unexpected child process 5 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

Processes:

rundll32.exerundll32.exerundll32.exerundll32.exerundll32.exe

description	pid	pid_target	process	target process
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1816	1340	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	552	1340	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1040	1340	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	964	1340	rundll32.exe	EXCEL.EXE
Parent C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE is not expected to spawn this process	1304	1340	rundll32.exe	EXCEL.EXE

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry
T1012

System Information Discovery
T1082

Processes:

EXCEL.EXE

description ioc process

Key opened \REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor EXCEL.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor	EXCEL.EXE

Modifies Internet Explorer settings 1 TTPs 9 IoCs

adware spyware

Modify Registry

T1112

Processes:

EXCEL.EXE

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\Toolbar\ShowDiscussionButton = "Yes"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\Contexts = "1"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\Toolbar	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\ONBttnIE.dll/105"	EXCEL.EXE
Set value (int)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\Se&nd to OneNote\Contexts = "55"	EXCEL.EXE
Key created	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel	EXCEL.EXE
Set value (str)	\REGISTRY\USER\S-1-5-21-293278959-2699126792-324916226-1000\Software\Microsoft\Internet Explorer\MenuExt\E&xport to Microsoft Excel\ = "res://C:\\PROGRA~2\\MICROS~1\\Office14\\EXCEL.EXE/3000"	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

1340 EXCEL.EXE
Suspicious use of SetWindowsHookEx 3 IoCs

Processes:

EXCEL.EXE

pid process

1340 EXCEL.EXE
1340 EXCEL.EXE
1340 EXCEL.EXE

pid	process
1340	EXCEL.EXE

pid	process
1340	EXCEL.EXE
1340	EXCEL.EXE
1340	EXCEL.EXE

Suspicious use of WriteProcessMemory 35 IoCs

Processes:

EXCEL.EXE

description	pid	process	target process
PID 1340 wrote to memory of 1816	1340	EXCEL.EXE	rundll32.exe
PID 1340 wrote to memory of 1816	1340	EXCEL.EXE	rundll32.exe
PID 1340 wrote to memory of 1816	1340	EXCEL.EXE	rundll32.exe
PID 1340 wrote to memory of 1816	1340	EXCEL.EXE	rundll32.exe
PID 1340 wrote to memory of 1816	1340	EXCEL.EXE	rundll32.exe
PID 1340 wrote to memory of 1816	1340	EXCEL.EXE	rundll32.exe
PID 1340 wrote to memory of 1816	1340	EXCEL.EXE	rundll32.exe
PID 1340 wrote to memory of 552	1340	EXCEL.EXE	rundll32.exe
PID 1340 wrote to memory of 552	1340	EXCEL.EXE	rundll32.exe
PID 1340 wrote to memory of 552	1340	EXCEL.EXE	rundll32.exe
PID 1340 wrote to memory of 552	1340	EXCEL.EXE	rundll32.exe
PID 1340 wrote to memory of 552	1340	EXCEL.EXE	rundll32.exe
PID 1340 wrote to memory of 552	1340	EXCEL.EXE	rundll32.exe
PID 1340 wrote to memory of 552	1340	EXCEL.EXE	rundll32.exe
PID 1340 wrote to memory of 1040	1340	EXCEL.EXE	rundll32.exe
PID 1340 wrote to memory of 1040	1340	EXCEL.EXE	rundll32.exe
PID 1340 wrote to memory of 1040	1340	EXCEL.EXE	rundll32.exe
PID 1340 wrote to memory of 1040	1340	EXCEL.EXE	rundll32.exe
PID 1340 wrote to memory of 1040	1340	EXCEL.EXE	rundll32.exe
PID 1340 wrote to memory of 1040	1340	EXCEL.EXE	rundll32.exe
PID 1340 wrote to memory of 1040	1340	EXCEL.EXE	rundll32.exe
PID 1340 wrote to memory of 964	1340	EXCEL.EXE	rundll32.exe
PID 1340 wrote to memory of 964	1340	EXCEL.EXE	rundll32.exe
PID 1340 wrote to memory of 964	1340	EXCEL.EXE	rundll32.exe
PID 1340 wrote to memory of 964	1340	EXCEL.EXE	rundll32.exe
PID 1340 wrote to memory of 964	1340	EXCEL.EXE	rundll32.exe
PID 1340 wrote to memory of 964	1340	EXCEL.EXE	rundll32.exe
PID 1340 wrote to memory of 964	1340	EXCEL.EXE	rundll32.exe
PID 1340 wrote to memory of 1304	1340	EXCEL.EXE	rundll32.exe
PID 1340 wrote to memory of 1304	1340	EXCEL.EXE	rundll32.exe
PID 1340 wrote to memory of 1304	1340	EXCEL.EXE	rundll32.exe
PID 1340 wrote to memory of 1304	1340	EXCEL.EXE	rundll32.exe
PID 1340 wrote to memory of 1304	1340	EXCEL.EXE	rundll32.exe
PID 1340 wrote to memory of 1304	1340	EXCEL.EXE	rundll32.exe
PID 1340 wrote to memory of 1304	1340	EXCEL.EXE	rundll32.exe

C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\Cancellation_Letter_1482876532-02242021.xls
1⤵
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1340

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\GDAS.UKDSR,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1816

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\GDAS.UKDSR1,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:552

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\GDAS.UKDSR2,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1040

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\GDAS.UKDSR3,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:964

C:\Windows\SysWOW64\rundll32.exe
rundll32 ..\GDAS.UKDSR4,DllRegisterServer
2⤵
- Process spawned unexpected child process
PID:1304

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

memory/552-8-0x0000000000000000-mapping.dmp

Download
memory/964-12-0x0000000000000000-mapping.dmp

Download
memory/1040-10-0x0000000000000000-mapping.dmp

Download
memory/1304-14-0x0000000000000000-mapping.dmp

Download
memory/1340-2-0x000000002FB81000-0x000000002FB84000-memory.dmp

Filesize
12KB

Download
memory/1340-3-0x00000000718D1000-0x00000000718D3000-memory.dmp

Filesize
8KB

Download
memory/1340-4-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/1548-5-0x000007FEF7D20000-0x000007FEF7F9A000-memory.dmp

Filesize
2.5MB

Download
memory/1816-6-0x0000000000000000-mapping.dmp

Download
memory/1816-7-0x0000000076691000-0x0000000076693000-memory.dmp

Filesize
8KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads